Carroting fur



Patented May 31 1927.

.J'OHN' H. MARTIN, OE CENTRAL PARK, NEW YORK.

CARBOTING FUR.

Io Drawing.

another, so change the character of the fur and particularly the character of the outer sheath or horny layer, as to promote the interlocking of the fur hairs in the process of a shrinking and felting. Whether this change is 1n the way of freeing scales which interlock or of otherwise changing the character of the outer layer is immaterial, although it is believed that the efiect of the practice of the present invention is to bring about a" change other than the freeing of scales. As is well understood in the art, the chemical employed, generally in solution, is sometimes brushed into' the fur on the skin, the fur being subsequently removed, and is sometimes used as a bath in which are immersed the fur hairs after removal from the skin. In either case the fur is dried after treatment with thechemical and is thereafter subjected to the dyeing and felting processes as may be desired. Various chemicals have been used or proposed to be used heretofore, some of which, like mercuric nitrate, have made the fur poisonous to those who handle .it in subsequent processes, while others, such as those which are more or less strongly alkaline, having a free alkali in coinposition, bring about a progressive weakening of the hair core such that in the processof aging' which is generally practiced by a hat maker,

, the fur deteriorates in quality.

In the investigation of the art and in the 40 development of the present invention, it has been found that the desired oxidation of the fur, which is thecharacteristic feature of the process of preparation. can be accomglished, without leaving any poisonous or armful deposit on the fur and without injuring the texture of the fun-while leaving it in favorable condition for subjection to subsequent treatment, such as dyeing, and

. promoting the union of the fur hairs in the process of shrinkin and feltinginby treatment of the fur, eit er on the s or after its removalfrom the skin, with a solution of one of the persalts, such, for example, as ammoniumpersulphate, potassium 681- bonate, or sodium perborate. Acco g to Application filed December 17, 1924. Serial No. 756,553.

the results desired and to the subsequent treatment, one or another of the persalts might be used by itself or two or more might be used in mixture. The solution of the persalt or persalts is preferably in pure water. If the articular chemical employed is relatively ei icient in oxygen, the deficiency can be supplied by the addition of hydrogen peroxide which by itself has been found not to (give satisfactory felting qualities. When ad ed to one/of the ersalts, however, the hydrogen peroxide wlll assist in carrying the oxidation of the fur hairs to the desired extent.

By the use of persalts, with or without the addition, of hydro en peroxide as may be required, it is posslble to avoid that degree of alkalinity, characterized by the presence of free alkali, which makes the solution alkaline and affects injuriously the texture of the fur. a

The alkaline quality of the decomposition product of a percarbonate or a perborate, for example, can be'corrected by mixing with it, for example, an equimolecular quantity of a persulphate, the decomposition product of which by itself would give an acid reaction. I

As indicated, the persalt employed is preferably of the alliali metal group of persalts, such as potassium'percarbonate or sodium perborate or of the alkali earth metal cup of persalts,-such as the persalts of ca cium and barium, the choice of the group depend.- ing to some extent upon the character of the fur bein treated or upon the particular results to e produced.

It. will be understood that the -mention herein of specific chemicals is by way of example and illustration only, and that the invention, in its broadest aspect, is not llmited 95 to the employment of one chemical or another of the. broad group referred to.

I claim as my invention:

1. The improvement in the art of carroting fur which consists in subjecting the fur 100 to the action of a lution of a persalt.

, 2. The improvement in the art of carrot ing fur which consists in subjecting the fur to the action of a persalt with the addition of hydrogen peroxide. 7 105 3. The improvement in the art of carroting fur which consists in subjecting the fur tothe action of a solution of a perborate.

4. The im rovement in the art of carroting fur which consists in sub ecting the fur 110 to the action of a solution of sodium.

5. The improvement in the art of carroting fur which consists in subjecting the fur perborate of 5 to the action of a solution of a perborate with the addition of hydrogen peroxide.

6. The improvement in the art of carroting fur which consists in subjectin the fur to the action of a solution of per orate of sodium with the addition of hydrogen per- 10 oxide.

This specification signed this 15th day of December A. D. 1924.

JOHN H. MARTIN. 

